Physics

Problem

A resistor of

15\,\Omega

and an inductor of reactance

20\,\Omega

are connected in series to an AC source. If the rms current in the circuit is

4\,\text{A}

, the rms value of the supply voltage is a)

140\,\text{V}

100\,\text{V}

80\,\text{V}

71\,\text{V}